Valve mechanism for piston-rod engines.



E E. BASHAW.

VALVE MECHANISM FOR PISTON ROD ENGINES.

APPLICATION FILED JULY 29, 19l5.

Patented Apr. 25, 1916.

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Specification of Letters Patent.

Patented l lrplr. 25, l lti.

Application filed July 29, 1915. Serial No. 42,506.

To all whom it may concern:

Be it known that l, EDvvIN EARL lBASHAW, a citizen of the United States, residing at Rochester, in county of Olmstead, and State of Minnesota, have invented certain new and useful Improvements in Valve-Mecha- 'nism for Piston-Rod Engines, of which the following is a specification.

My invention relates to an improvement in valve mechanism for piston-rod engines, the object being to dispense with the use of eccentrics, and otherwise simplify the construction and reduce the parts to a minimum.

It consists in a cylinder with a reciprocating piston therein, in connection with three slidable rods connected together and carrying valves, one of which rods is located at either end of the cylinder in position to be alternately struck by the piston whereby to move the valves on each rodto control the passage of steam, and direct it alternately to the opposite ends of the engine-cylinder.

In the accompanying drawings :Figure l is a vertical longitudinal section; and Fig.

2 is a view showing an application of the 4 power to a rotary wheel and shaft.

A, represents the cylinder, and 1 is the piston fittedto reciprocate therein. Rods 2 and 3 are slidably mounted in opposite ends of the cylinder in position to be alternately struck by the piston and forced outward. These rods 2 and 3 each carry a valve 4 and 5, respectively, which valves control the outlets of the steam-passages 6 and 7 to the exhausts 8 and 9. An additional rod 10 is slidably mounted in the steam passage, and this rod carries a valve 11, which controls the inlet of live steam from the port '12. Levers l4: and 15 are fulcrumed at 16 and 17, respectively, at opposite ends of the cyl-. inder, and these levers are pivotally connected at opposite ends to the rods 2 and 10 and 3 and 10 respectively, so that the rods all move together, although rod 10 always moves in the opposite direction from the movement of rods 2 and 3.

When all the valves 4i, 5 and lLare in the position shown in full lines in the draw-,

ing, the live steam passes in through the port 12, and turns to the left, and thence against the left side of the piston 1, forcing it to the right, where it strikes the inwardlyprojecting end of the rod 2,, forcing it to the right, and with it the valt e 4, meanwhile the steam from the right-hand end of the cylinder exhausting through the exhaust 8 at the right of-one end of the cylinder, until the rod 2 has been struck by the piston and moved far enough to cause the. valve to close the steam passage. This reverses the valve 11, and the steam flows to the right thereof, and against the right-hand head of the piston 1, moving it in the'opposite direction, whereupon the steam exhausts through pipe 9; and in this way the operation continues automatically without the use of eccentric or other mechanism except as has been hereinbefore described.

Rods 20, 20, are secured to the piston l, and extend through orifices 21, 21, in the right-hand head of cylinder A, and their outer ends are secured to the cross-head 22, the function of the rods 20, 20 thus being to force the cross-head back and forth with each movement of the piston 1.

In Fig. 2, there is shown an application of the power which may be derived from the reciprocating cross-head 22, a stem 23 extending therefrom and connecting with a connecting-rod .24: pivoted thereto and to the balance-wheel 25, which is driven thereby, and which steadies the movements of the piston 21.

ll claim:

1. The combination of a cylinder, live and exhaust-steam passages in communication therewith, a reciprocating piston therein, three slidable rods connected together, and each carrying a valve, one rod normally extending into one end of the cylinder in position always to be struck by the piston whereby all three rods and valves are actuated.

2. The combination of a cylinder, a piston reciprocating therein, live steam passages extending into opposite ends of the cylinder, exhaust pipes leading therefrom to the points where the steam is to be released,

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three slidable rods, each carrying a' valve to tion to be struck, whereby all three are sicontrol and direct the livesteam and also multaneously shifted together with their the exhaust at each end'of the cylinder, and valves to reverse the direction of the steam. in levers each fulcrumed at ornea-r its center In testimony whereof I affix my signa- 5 and .pivotally connected at its ends with two ture.

of the rods, one red always'proje'cting nor: mally into the path of the piston in posi- EDWIN EARL BASHAW. 

